Respirator mask



May 24, 1927.

1,630,209 H. s. OLGARD RESPIRATOR MASK Filed April 9. 1926 2 Sheets-Sheet l 1 .\'VEN TOR.

ATTORNEY.

1 630 209 May 24, H. s OLGARD 9 nasrnmon MASK Filed April 9. 1926 2 Sheets-Sheet 2 Patented 'Ma i24, 1527. n 1,630,209

UNITED, STATES PATENT orrics;

nannies. owns, or Ko'nnnn, wrsoonsm. tnnsrmyron MASK. Application filed April 9, 1926. Serial No. 100,883.

This invention relates to respiratory connection with respirators of this type and masks and pertains particularly to a mask this cap is provided at the front edge with designed to be positioned agaiustthe face the metal loop 2 into which the hook memto enclose the mouth. and nostrils, for the her 3 of the respirator mask is adapted to a protection of 'the wearer against noxious engage to assist in maintaining the mask gases, dust laden air, and other deleterious in osition against the users face. substances in the atmosphere. he mask which. constitutes a part of the Another object of the invention is to prorespirator structure embodying this invenvide, in a manner as hereinafter set forth, tion, comprises a face cone portion 4 which 10 an improved type of respiratory mask havas is shown, is in the form of a frusto-conical ing improved air inlet and outlet means of body having the edge of the base portion such construction as to require a minimum thereof cut to conform roughly to the conamount of space inthe mask structure. thus tour of the human face. materially reducing the size and weight of Secured about the base edge of the cone 15 the same. a I 4 is an 'air cushion body 5 which is roughly 7 A still further object of the invention in the form of a tub which traverses the is theprovision, in a manner as hereinafter edge of the base of the cone 4. This air set forth, of a respirator mask having the or cushion tube 5 is provided with the infront' portion thereof adapted for easy and wardly extending web 6 which overlies the quick removal in a plurality of sections, outer surface of the cone 4: and is secured so that the interior of the mask can be thereto by, cementing or other appropriate easily gotten at for repair'or adjustment. means. r t the upper side of the cone Other objects of the invention are the the cushion tube 5 is provided with the provision, in a manner as hereinafter set. tongue 7 which extends inwardly against 25 forth, of a respirator structure of light but the inner 'wall of the cone as shown in strong and durable construction, easily Figure 3. placed into position, and comparatively in-. A securing band 8 extends about the cone expensive to manufacture and set up. body iadjacent the forward end thereof The invention will be best understood and is secured'to the body by means of the 30 from a consideration of the following debolts 9. As is shown in Figure 3 one of tailed description taken in connection with these bolts 9 passes through the tongue 7 the accompanying drawings, with the of the cushion tube and secures the same understanding that the invention is'not conin position against the inner wall of\ the fined to any strict conformity with the cone. 0 I showing of the drawings, but may, be A valve 10 forms a part of the cushion changed and modified solong as vsuch tube structure 5 and by means of this valve changes and modifications mark no matethe cushion can be filled with air. a a rial departure from the salient features of Extending transversely vof the band 8 the invention asexpressed in the appended which fastens -bout"the' cone body 4, at claims. i the top of the cone body, is a relatively In the drawings short band 11 which terminates at the rear Fi ure 1 shows the complete device emend in the hinged knuckles 12 and the for bodymg this invention in the position asward end thereof is bent upwardly as zit- 13 sumed by it when in use. and then has the terminus directed for- -Figure 2 is a top plan view of the wardlypf the cone body as indicated at 14.

respirator mask. This forwardly-directed portion 14 is formed Figure 3 is a vertical section taken upon with the note 15 to formahook member. the line 33 of Figure 2 and, A hinge leaf '16 has one end pivotally at- Figure 4 is a transverse section taken on. tached tothehinged knuckles 12 by means 'the line i of Figure 1. 1 I F p of the pivot pin 17 and this hinge leaf is Referring now to the drawings in detail securely bolted by the boltmembers 18 to wh r n i numerals of reference indicate the hiwer end ofthe hook body 3. 1 corresponding parts throughout the several The edge of the forward or constricted views, there is indicated by the numeral 1 portion of the cone body 4 1s formed to set. a head cap of thetype ordinarily used in. upthe forwardly directed annular portion ,these flap valvesand chamber 27, .is a tube 34, the inner 19 which forms a part of the inwardly directedflange 20, which flange constitutes the front wall of the cone body. As is. shown, this flange is relatively broad and has extending in through the cone from the edge thereof the collar portion 21.

Positioned against the outer side of the wall220 of the cone structure 4, is an air exchange receptacle indicatedgenerally by the numeral 22. This receptacle 22 is of rectangular conformation at the lower portion while the upper portion thereof is substantially semi-circularas shown in Figure 4. Extending transversely of the interior of the receptacle is a pair of horizontally spaced partitions 23 and 24 respectively, each of which partitions has an elongated passage therethrough as indicated by the numeral 25. There is thus set up the 11 per and lower, or air outlet andinlet cham ers,-' 26 and 27, respectively, while between these two chambers there is formed avestibule 28 one side wall of which is provided with the opening 29 which opens through the collar 21 into the cone body 4, when the parts are in the. position shown in Figure 3, or assembled. Covering the upper surfaces of the partitions 23 and 24, is a leather or felt body 29 and resting upon these coverings and overlying and closing the passages 25 through the partitions 23 and 24, are flap valves 30 and 31 respectively. Each of these flap valves 30 and 31 has the under side thereof covered with material similar to that which covers the partitions 23. and 24, so that a perfectly air-tight closure can be made by the valve bodies. As is clearly shown in Figure '4, 31 are hingedly attached as at 32 to one side wall of the body 22 and both valves are arranged to open upwardly. The upper valve 31 which controls the flow of air from the cone body 4 through the vestibule 28 and the chamber 26 to the atmosphere, is held closed under slight tension by means of the spring 33, one end of which bearsagainst the top. of the valve body while the other end bears against the underside ofthe top of the casing 22.

One sidewall of the casing 22 adjacent the bottom thereof, has an opening formed therethrough and extending inwardly from this opening into the lower or air inlet end of the tube terminating at approximately the central portion of thecasing.

3 The front wall 35 of the casing 22, is set inwardly from the front edges of the side walls of the casing as is shown in Figure 3 and the lower portion of this front wall 35 slopes inwardly 01' cuts beneath the easing 22 as indicated at 36.

The upper portion of the front wall of the casing'22, instead of bemg sol d as is the lower portion 36, is'formed of a foraminous body of material 37 the lower edge of which is secured along the front edge of the partition 24. Thus the entire front wall of the upper or air exhaust chamber 26 is formed of this foraminous body. Tongue members 38 project inwardly from the curved top portion of the casing 22, as shown in Figure 4, and against these tongues the foraminous body 37 bears. The outer surface of the foraminous body 37 is covered by another foraminous body of finer weave as indicated at 39. It is preferred to'make the body 37 of copper gauze and the body 39 of cloth material. i

Fitted overthe frontof the casing 22 of the respirator body, is a cap 40 having the surrounding flange 41 which engages the top, sides and bottom of the casing. As *above stated, the front wall 35 of the easing 22 is set inwardly from the front edge thereof and it will be readily seen that when the cap 40 is in position across the front of the casing there will be set up between the cap 'top and the wall 35 a chamber 42. That part of the flange 41 which extends across the lower side of the cap 40, is provided with the slot 43. As is shown, the lower portion of the passage 42 which is thus set up between the top of. the cap 40 and the wa l 35 of the casing, turns inwardly following ill) the line of the inwardly inclined wall portion 36. It will be readily seen from this description that air passing from the cone 4 through the vestibule 28 and through the valve into the chamber 26 will escapefrom the respirator through the foraminous wall structures 37 and 39 and into the atmosphere through the port 43 of the passage 42. Frictionally engaged in the tubular sleeve 34, is a fresh air discharge nozzle 44 which extends fromone side of the head 45 of the flexible fresh air supplying tube 46. The other end of the tube 46 opens into and receives air from the pouch or bag 47 which is adapted to be secured to the back of the user of the respirator, by means of thestrap 48, of which there are two, which pass over the users shoulders to a meeting point over the chest, from which point a depending strap 49 extends to, and is secured to, the waist belt, as shown.' From the bottom of the bag there extends a strap 49 which is secured to the waist belt, at the back to hold the bag down. I

Leading to the air pouch, is an air inlet tube 51 which may be valved at the inner end to allow the air to enter the bag, only. The other end of the tube is usually allowed to trail free along the-floor at the users feet. Pivotally attached to each side of the cone structure 4, by means of the screws 52, aresecuring or holding hands 53 which are adapted to be passed across the back of the head of the wearer of the mask, and

lllll secured together by means of the buckle structure 54 to assist in holding the mask in position against the wearers face.

- The inner wall of the casing 22 has an.

annular flange 55 extending therefrom, the overall diameter of which annular flangeis slightly less than the collar 21 formed upon the front wall 20 of the corie. This annular flange 55, is as 0 shown in Figure3, adapted to extend ,ihto and frictionally engage the collar'21 tosup- 'ort the casing 22 in position against the ront wall of the cone. supporting is provided 1 the stud 56 upon vthe top of v the casing body beneath the head of which the hook 15 of the member 14 is engaged as shown. This, hook 15 is pivotally .held by the bolt 9 which extends through the top -sired to engage the hook beneath the head of the stud 56, the body portion 11 is formed about the bolt 9 to engage or disengage the stud 56 with the hook. 2 above described, the outlet valve 31 withm the casing 22,- is normally held closed by the tension of the spring 33. In connecion with the inlet valve 3.0, however, no means is employed for holding the 'valve in closedposition except the attraction of gravity. Means is employed, however, for preventing this valve from opening too far, which means comprises an arm 57 which overlies the valve and which has a leg 58 35. extending through the vestibule opening 29 L and secured to the inner wall of the casing as shown in Figure 3.

Having thus described my invention what 7 I claim is zhollow frus- 1. A respirator comprisinga h to-coliical face tengaging member formed with cushioning means to abut the face of the interior diameter of,

In adition to this means for the casingy22, there part of thecbne 4 so that when it is de-' the wearer, a casing having an inset front wall provided with a iorammous upper part and a rearwardly inclined lower part, means within sai casingto provide an upper air escape compartment, an intermediate air vestibule and a lower fresh air inlet compartment, means for connecting the casing tothe front of and. for establishin communication thereof with said body, sai

trolled passages 1 having a foraminous element inter osed between the foraminous upper part 0 said front wall and said cap member.

3. A respiratorin accordance with claim 1 having said cap member formed with an inclined lower portion opposing the inclined lower part of said -front wall and with the outlet for the'air passage arranged air escape compartment, and a flanged cap member vestibule opening into said means, valve con-' I for establishing communicatlon between said compartments and the vesb etween the inclined lower part of the front wall and the inclined lower portion of the cap member.

4. A respirator in accordancewith claim lliaving the hollow frusto-conical shaped body. thereof provided with a hinged element for detachably connecting sa d body" to a head cap.

In testimony ture hereto. V

- HARRY S. OLGARD.

whereof,,l'alfix'my sign;- I 

